Thursday, 1 December 2011

C# Crystal Reports Formula Field

The following C# - Crystal Reports section describes how to add a formula field in the Crystal Reports .
All C# Crystal Reports Tutorial in this website is based on the following database - crystaldb. So before you begin this section , please take a look at the database structure of crystaldb - Click Here C# crystaldb
If you are new to Crystal Reports and do not know how to create Crystal Reports from C# , please take a look at the section step by step tutorial for creating a Crystal Reports from C#.
The situations when formula field is using :
If you have a Crystal Reports with Qty and Price fields and you need an additional field in your Crystal Reports for Total, that is TOTAL = QTY X PRICE . In these types of situations you can use the Formula Field in Crystal Reports.
In this C# Crystal Reports tutorial we are showing that all orders with qty and price and the total of each row , that means each in each row we are showing the total of qty and price.
Before starting this tutorial Create a new Crystal Reports with fields CustomerName , Order Date , Product Name and Product Price . If you do not know how to create this report , just look the previous tutorial C# Crystal Reports from multiple tables . In that report selecting only four fields , here we need one more field Product->Price and one formula field Total.
After you create the above Crystal Reports, your CR designer screen is look like the following picture :
csharp-crystal-formula-designer
Next step is to create a Formula Field for showing the result of Qty X Price .
Right Click the Formula Field in the Field Explorer and click New. Then you will get an Input Message Box , type Total in textbox and click Use Editor.
csharp-crystal-report-formula-editor
Now you can see the Formula Editor screen . Here you can enter which formula you want . Here we want the result of Qty X Price . For that we select OrderDetails.Qty , the multipy operator (*) and Product.Price . Double click each field for selection.
csharp-crystal-formula-editor
Now you can see Total Under the Formula Field . Drag the field in to the Crystal Reports where you want to display Total.
csharp-crystal-report-formula-designer
Now the designing part is over and the next step is to call the Crystal Reports in C# and view it in Crystal Reports Viewer control .
Select the default form (Form1.cs) you created in C# and drag a button and a CrystalReportViewer control to your form .
You have to include CrystalDecisions.CrystalReports.Engine in your C# Source Code.
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;



using System;
using System.Windows.Forms;
using CrystalDecisions.CrystalReports.Engine;

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            ReportDocument cryRpt = new ReportDocument();
            cryRpt.Load(PUT CRYSTAL REPORT PATH HERE\\CrystalReport1.rpt");
            crystalReportViewer1.ReportSource = cryRpt;
            crystalReportViewer1.Refresh();
        }
    }
}

cryRpt.Load(PUT CRYSTAL REPORT PATH HERE\\CrystalReport1.rpt");
The Crystal Reports file path in your C# project files location, there you can see CrystalReport1.rpt . So give the full path name of Crystal Reports file like c:\projects\crystalreports\CrystalReport1.rpt

When you run this program you will get your screen like the following picture.

csharp-crystal-report-formula-final
 
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